/*
 * Copyright (c) 2014, Peter Thorson. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the WebSocket++ Project nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#ifndef WEBSOCKETPP_CLIENT_ENDPOINT_HPP
#define WEBSOCKETPP_CLIENT_ENDPOINT_HPP

#include <websocketpp/endpoint.hpp>
#include <websocketpp/uri.hpp>

#include <websocketpp/logger/levels.hpp>

#include <websocketpp/common/system_error.hpp>

#include <string>

namespace websocketpp
{

/// Client endpoint role based on the given config
/**
 *
 */
template <typename config>
class client : public endpoint<connection<config>, config>
{
public:
  /// Type of this endpoint
  typedef client<config> type;

  /// Type of the endpoint concurrency component
  typedef typename config::concurrency_type concurrency_type;
  /// Type of the endpoint transport component
  typedef typename config::transport_type transport_type;

  /// Type of the connections this server will create
  typedef connection<config> connection_type;
  /// Type of a shared pointer to the connections this server will create
  typedef typename connection_type::ptr connection_ptr;

  /// Type of the connection transport component
  typedef typename transport_type::transport_con_type transport_con_type;
  /// Type of a shared pointer to the connection transport component
  typedef typename transport_con_type::ptr transport_con_ptr;

  /// Type of the endpoint component of this server
  typedef endpoint<connection_type, config> endpoint_type;

  friend class connection<config>;

  explicit client() : endpoint_type (false)
  {
    endpoint_type::m_alog.write (log::alevel::devel, "client constructor");
  }

  /// Get a new connection
  /**
   * Creates and returns a pointer to a new connection to the given URI
   * suitable for passing to connect(connection_ptr). This method allows
   * applying connection specific settings before performing the opening
   * handshake.
   *
   * @param [in] location URI to open the connection to as a uri_ptr
   * @param [out] ec An status code indicating failure reasons, if any
   *
   * @return A connection_ptr to the new connection
   */
  connection_ptr get_connection (uri_ptr location, lib::error_code &ec)
  {
    if (location->get_secure() && !transport_type::is_secure() ) {
      ec = error::make_error_code (error::endpoint_not_secure);
      return connection_ptr();
    }

    connection_ptr con = endpoint_type::create_connection();

    if (!con) {
      ec = error::make_error_code (error::con_creation_failed);
      return con;
    }

    con->set_uri (location);

    ec = lib::error_code();
    return con;
  }

  /// Get a new connection (string version)
  /**
   * Creates and returns a pointer to a new connection to the given URI
   * suitable for passing to connect(connection_ptr). This overload allows
   * default construction of the uri_ptr from a standard string.
   *
   * @param [in] u URI to open the connection to as a string
   * @param [out] ec An status code indicating failure reasons, if any
   *
   * @return A connection_ptr to the new connection
   */
  connection_ptr get_connection (std::string const &u, lib::error_code &ec)
  {
    uri_ptr location = lib::make_shared<uri> (u);

    if (!location->get_valid() ) {
      ec = error::make_error_code (error::invalid_uri);
      return connection_ptr();
    }

    return get_connection (location, ec);
  }

  /// Begin the connection process for the given connection
  /**
   * Initiates the opening connection handshake for connection con. Exact
   * behavior depends on the underlying transport policy.
   *
   * @param con The connection to connect
   *
   * @return The pointer to the connection originally passed in.
   */
  connection_ptr connect (connection_ptr con)
  {
    // Ask transport to perform a connection
    transport_type::async_connect (
      lib::static_pointer_cast<transport_con_type> (con),
      con->get_uri(),
      lib::bind (
        &type::handle_connect,
        this,
        con,
        lib::placeholders::_1
      )
    );

    return con;
  }
private:
  // handle_connect
  void handle_connect (connection_ptr con, lib::error_code const &ec)
  {
    if (ec) {
      con->terminate (ec);

      endpoint_type::m_elog.write (log::elevel::rerror,
                                   "handle_connect error: " + ec.message() );
    } else {
      endpoint_type::m_alog.write (log::alevel::connect,
                                   "Successful connection");

      con->start();
    }
  }
};

} // namespace websocketpp

#endif //WEBSOCKETPP_CLIENT_ENDPOINT_HPP
